Automatic fluid-pressure cut-off.



M. L. GROVE.

AUTOMATIC FLUID PRESSURE CUT-OFF.

' .-APPLlcMloN FILED SEPTU9. 19111.

Patented 001;. .5, 1915.l

ATTORNEY Tylersburg,

MARTIN L. eEovE, or T YLEESEUEG, PEN wrLLIAM ALEXANDER W-EAY ANL ONE* BURG, PENNSYLVANIA.

NsYLvANIA, `AssIerNoEeoE ONE-HALE 'roI sIx'rH To ALBERT FOY-BOTH or TYLEEs.

AUTOMATIC ELIn-PEEssUEE CUT-OEE.

Specification of Letters Patent. atentd Oct. 5, 1915i.v

Application led September 9, 1914. Serial No. 860,882.

improve the construction of automatic cut- ,offs shown and described in Patent No'. 1,050,646, granted to meJanuary 14, 1913,

- and to provide' a simple, practical, and eili- -ous changes in the form,

' pressure.

cient automatic cut off of strong, durable, and comparativel inexpensive construction, designedfsfor use in various Huid pressure conduits," such as gas, water, steam, etc.; and operable through an abnormal increase in the How of such Huid pressure for positively cutting olf the same without being affected by an abnormal decrease in the flow of the gas or other fluid pressure.

With these and other objects in view the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated' in the accompanying v drawing, and pointed out in the claims hereto appended, it being understood that variproportion, size and minor detailswithinthe scope ofthe claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the' invention.

' In the drawing :Figure 1 is a vertical longitudinal sectional view of anautomatic cut off constructed in accordance with this invention, the parts being set for operation. Fig. 2 is a similar view, illustrating the arrangement of .the parts when tripped by an abnormal .increase in the flow of the fluid Fig. 3 isa plan view, the top plate or cover being removed and the adjusting screw and the resetting' screw being sectioned.

Like numerals of reference designate corr responding parts in all the figures of' the drawing.

In the accompanying drawing, in which is illustrated the preferred embodiment of the invention, 1 designates an oblongcasing designed to be constructed of cast meta;E

'o integral bottom, side', and end walls, and a ples,

removable top plate 2, which is securedby bolts 3 or other suitable 'fastening devices to the body of the casing, a suitable packing 4' being interposed between the top plate or cover 2 and the body to provide a tight ,1o1nt or connection.

The casing is divided by an integral transe' versely disposed vertical partition 5 into a front inlet compartment 6 and a 'rear outlet compartment 7, into'which the fluid pressure passes from the in let compartment 'throu'gh a tubular connectmg passage 8, formed integral with the partition and preferably lo,

cated at thev bottom thereof, asshown. The

casing is providedat the front and rear -endI walls with threaded inlet and outlet openings9 and 10, preferably in the form of nipas shown, and receiving thel threaded ends 11 and 12 of i'nlet and outlet pipes 13 and 14, but the. connection between the casing and the pipes may be made in any other desired manner. The casing is equipped at the rear outlet compartment 7 with an outlet passage 15 of approximately L-shape, consisting of rearwardly extending horizontal portion, which is connected withthe outlet opening 10. The outlet passa-gel 15 is. preferably formed by integral walls or partitions, similar to the outlet of the'casing of the aforesaid patent. The 'outlet passage, which extends upwardly from the bottom of the casing, terminates midway between the top and bottom thereof, being provided at the top with a valve seatl surrounding an opening 17 and adapted to receive an automatically closing valve or closure 18, preferably in the form of a valve plug, as `shown in the aforesaid patent, and carried-by an oscillatory arm 19. The oscillatory arm 19 consists of arbar or piece pivotally mounted at, an intermediate point on ak transverse pivot 20 and having a rearextension 21 adapted to be engagedfby` a resetting device 22. lThe valve or closure 18 is preferably tapered to ,it the opening 1'7, 'which is `correspondingly tapered, and 'the said'valve or closure is preferably provided with agasket 23 consisting of a; ring of rubber or vany other suitable material, having its inner edge secured in an annular groove 24 inthe valve or closure, but any other suitable valve or closure may, of course, be employed. The pivot 20 is located above and'slightly in rear of the valve seat, and the oscillatory arm, which carries the valve or closure, ex-

tends upwardly and forwardly from the pivot, being arranged atan inclination when set for automatic operation. The valve oi closure isv preferably integral with the arm and the latter may also be thickened, as shown, adjacent to the valve plug or closure to secure the necessary weight and the de sired pressure on the valve or closure when the same is in its closed position. as illustrated in Fig. 2 of the drawing.

The valve or closure, which, when released, automatically closes by gravity, is held in an open position by a latch 25, consisting of a bell crank lever fulcruined at -its angle on a transverse pivot pin 2G and composed of an upper rearwardly extending arm 2i and a front depending arm 2S.

The pivot ".26 is located at the upper portion` of theI outlet compartment adjacent to the transverse partition 5, and the arm 27, which is arranged at an' inclination(engages the oscillatory arm 19, which is provided adjacent to its front or upper end 29 with a flange or lug 30, forming a seat for the arm 27. The upper or front end 29 projects beyond the flange 30 and forms a shoulder for engaging with the arm 2T of the latch'. The depending arm 28. which is in an approximatelyvertial position when the parts are.

set for automatic operation, as shown in Fig. 1. extends downwardly from the pivot to the connecting passage S and bears against the rear end of the tubular portion of the transverse partition and limits the downward movement of the upper arm. The depending arm is equipped yat its lower end with a finger 31, extending into the. passage S and also into the path of a closure 32, preferably in the form of a plug. as illustrated in the aforesaid patent. and carried by a bell crank lever 233, consisting of a relatively long depending arm 'l-land a relatively short upper rearwardly extending arm The bell crank lever 323, which is located within the inlet compartment. is fulcrumed at its iangle on a transverse pivot pin 3G. located abovevthe connecting passage i.. The depending arm extends downwardly from ythe pivot 3G to the front end of the connecting passage 8, and the closure is provided with a tapered portion 87 to fit the front portion 38 of the connecting passage, which ,is correspondingly tapered, and the said closure 32 is also provided with an integral stop flange 39 for limiting the inward or rearward movement of the closure to prevent the same from becomingwedged or sticking in the tapered front portion 38 of the said passage. Any other suitable form of closure may, of course, be employed, and when the said closure 32 moves inwardly or rearwardly to its closed position shown in Fig. 2, .it engages the nger 31 and forces the saine rearwardly to lift the upper arm '27 of the latch out of engagement with the oscillatory arm 19 to permit the valve or closure 18 to be swung by gravity to its closed position.

A coiled spring L10, which beats upon the front arm 35 and yieldably maintains the closure 32 in the open position shown in Fig. 1, is engaged by one arm of a lever #11, pivoted at an intermediate point on a transverse pivot 42 and having its other end 13 forked or bifurcated to engage an annular groove 44 of an adjusting screw 45, mounted in a threaded opening in the top plate or cover of the casing and adapted to be adjusted to vaiy the tension of the spring 40 and thereby adjust the automatic cut otl' to close under the desired increase in the flow of the fluid pressure through the connecting passage. The tension adjusting means is substantially the same as that shown and described in theaforcsaid patent, with the exception that the upper end 46 of the adjusting screw is squared for the reception of a key, instead of being provided with an end slot. Any other preferred form of adjusting means may, of course, be employed.

The casing is equipped at the front with a screen -17 similar to that shown in the aforesaid patent, and the resetting device 3&2, which is adapted to swing the oscillatory arin 19 upwardly to rengage the same with the latch, preferably consists of a screw mounted in a threaded opening at the top or cover of the casing and adapted to be screwed downwardly from the position shown in Fig. 2 to that illustrated in Fig. 1. lYhen the oscillatory arm is swung downwardly to close the outlet and cut oiof the How of the fluid through the, device, the rearward extension 21 is arranged in a substantially horizontal position and the downward movement of the resetting screw 22 carries a lower rounded head -18 thereof into engagement with the extension 21 and lifts the valve or closure 18. The arm 19. in its upward movement, contacts with the arm 2T of the hitch, lifting the said arm 27. which drops into engagement with the end 29 of the said arm 19 and rests upon the seat 30 as soon as the said end 29 is carried beyond the rear end of the arm 2T of the latch by the resetting device. The resetting device is then moved upwardly from the position shown in Fig. 1 to that illustrated in Fig. 2, and the parts of the automatic cut ott' are then in position for operation by a predetermined increase in the fiow of the tiuid pressure.

The gas or other fluid pressure enters the casing at the inlet 9 and the impurities are screened out by the screen 4:7. It .the flow of the gas is normal or below normal. the

closure 32 will remain open and any gas lll@ intermediate passage 8 from'the front or inlet compartment, into the rear or outlet compartment, andY pass out of the casing through the passage 15. Any decrease or cessation of the iiow of the iiuid pressure will not operate to trip the automatically closable valve or-closure 24, but should the flow, through any cause, increase beyond a predetermined' point, it Will overcome the pressure .of the spring 40 and carry the tripping de'viceh formed by the closure 32 and the oscillatory arm 34 into engagement with the nger of the latch lever and lift the arm 27 of the latter'. This will permit the valve or closure to close and seat itself and cut off the How of fluid pressure through the outlet passage 15. After an automatic operation of the cut oif, the valve or closure l8'ivill` remain in its closed position until reset by the resetting device 22.

That is claimed is :`-v

' l. An automatic fluid pressure cut oii' including a casing having an inlet and an outlet and provided with a passage, an automatically closab-le v`valve or closure for cut- 'ting ofi' the iovv of fluid pressure through the outlet, a latch `for normally holding the valve or closure in its open position, and a closure for'the said passage yieldably maintained in an open position and operable through ,an"abnorma increase in the flow `and movable into engagement With the latch to release thesaidnvalve or closure.

2.- An automatic fluid pressurefcut off in- 'cludinga A casing having inlet and outlet lcompartments and a connecting passage, an

automaticallyl-closable valve for cutting 0H the flow o-uid pressure, a latch arranged to hold the valve or closure in an open position and having a linger or portion eX- tending into the said passage, and a tripping Copies of this patent may be' obtained for device operable through the abnormal increase in the fluid pressure through the passage and arranged to engage the said linger or portion to trip the valve or closure.

3. An automatic fluid pressure cut 0H including a .casing having inlet and outlet compartments and a connecting passage, an automatically closable valve for cutting off the flow of'iiuid pressure, a latch consisting of a bell crank lever having one arm arranged to engage and hold the valve or closure in the open position thereof, the other arm of the bell crank lever being provided witha finger extending into the passage, and a closure located in the inlet compartment and yieldably maintained in an open position and closable through an abnormal increase in the fluid pressure, the last mentioned closure being movable into and out of engagement with the finger and adapted to trip the said valve or closure.

4. An automatic fluid pressure cut off comprising a casing having inlet and outlet compartments and a connecting passage, said casing being also provided with an outlet, an automatically closable valve or closure for cutting oi the How through the y outlet, a latch device for holding the .said valve or closure in its open position, and a tripping device including a closure adapted to close the intermediate passage, said latch i device being arranged to be engaged and operated by the last mentioned closure to re lease the said valve or closure.

In testimony, that I claim the Jforegoing as my own, I havehereto affixed my signature in the presence of two Witnesses.

. MARTIN L. GROVE.

Witnesses:

JOHN I-I. SIGGERS, FRANCES P. SMITH.

lve cents each, by addressing the Commissioner ofv-latents,

Washington, D. C. 

